package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

/**
 * 菜品管理
 * @author admin
 * @date 2024/9/15
 */
@Service
public class DishServiceImpl implements DishService {

    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    /**
     * 新增菜品和口味
     */
    @Override
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
    //     新增菜品
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.insert(dish);

        Long dishId = dish.getId();

        //     新增口味
        List<DishFlavor> flavors = dishDTO.getFlavors();

        if(flavors != null && flavors.size() > 0) {
            flavors.forEach(flavor -> flavor.setDishId(dishId));
        }

        dishFlavorMapper.insertBatch(flavors);

    }

    /**
     * 菜品分页查询
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 菜品批量删除
     */
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
    //     起售菜品不能删除
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if(dish.getStatus() == StatusConstant.ENABLE) {
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }

    //     套餐关联菜品不能删除
        List<Long> mealIdsByDishIds = setmealDishMapper.getMealIdsByDishIds(ids);
        if (mealIdsByDishIds != null && mealIdsByDishIds.size() > 0) {
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        // for (Long id : ids) {
        //     dishMapper.deleteById(id);
        //     //     删除口味
        //     dishFlavorMapper.deleteByDishId(id);
        // }
        dishMapper.deleteByIds(ids);

        dishFlavorMapper.deleteByDishIds(ids);

    }

    /**
     * 菜品起售停售
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        Dish dish = Dish.builder()
                .status(status)
                .id(id)
                .build();
        dishMapper.update(dish);
    }

    /**
     * 根据id查询菜品和对应的口味
     */
    @Override
    public DishVO getByIdWithFlavor(Long id) {
        // 查询菜品信息
        Dish dish = dishMapper.getById(id);

    //     查询口味信息
        List<DishFlavor> flavors = dishFlavorMapper.getByDishId(id);

        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(flavors);

        return dishVO;
    }

    /**
     * 修改菜品
     */
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
    //     更新菜品信息
        dishMapper.update(dish);
    //     更新口味信息,先删除，再加入
        dishFlavorMapper.deleteByDishId(dish.getId());
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null && flavors.size() > 0) {
            flavors.forEach(flavor -> flavor.setDishId(dishDTO.getId()));
        }

        dishFlavorMapper.insertBatch(flavors);
    }

    /**
     * 根据分类id查询菜品
     */
    @Override
    public List<Dish> list(Long categoryId) {
        List<Dish> dishList = dishMapper.list(categoryId);
        dishList.forEach(dish -> dish.setStatus(StatusConstant.ENABLE));
        return dishList;
    }

    @Override
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.listAll(dish);
        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d, dishVO);

        //     添加口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());
            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
